Van just cut off on me. Thought it was ignition so I replaced that still nothing. No lights on dash. Won't turn over. No power coming out of ignition switch

 

Check battery connections.

 

It has power to everything that doesn't go through the ignition. Battery connections are good.

 

Blown fuse? Fusible link? Not sure which flavor your van would have, or where they would be hiding.

 

the ecu may be at fault

 

Check if the power comes to the starter solenoid by using test light while someone is cranking at the switch. If the power is coming to the solenoid and you do not hear a clicking noise from the solenoid, tap on it while cranking. If still no cranking. Jump the power between the two terminals in front of solenoid - that is you are by passing the solenoid and supplying current direct to the starter. If the starter does not crank the engine, possible the starter is shot. If the engine cranks but will not start, ECU or power to the ECU can be an issue. Good luck.